Charles f



i @uiten-"tapes atrut @fitta CHARLES F. HITGHINGS, OF NEW YORK, N. Y.

Leners Patent Np. 67,053, dazed July 23, 1867.

BOILER FOB. HEATING BUILDINGS.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, CHARLES F. HITCHINGS, of the city, county, and State of New York,l1'ave invented a certain new and useful Improvement in Boilers for Heating Buildings, and other purposes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification, and in which- \Figure 1 represents a side elevation (partly broken or sectional) of a water-heating apparatus constructed according to my invention.

Figure 2, a longitudinal vertical section of the same through the line yy in fig.A 3.

Figure 3, a transverse section thereof` through the line :v x in iig. 2; and

Figure 4, a horizontal section through the line z z in lig. 2.

Like letters indicate corresponding parts throughout the several figures.

The nature of my invention consists-,vrstly, in a boiler for heating buildings, the body of which is constructed in halves or two cast-metal sections, forming., when united, a vertical joint, projecting into or within the water space, and constituting the fire-chamber and return-due, the-same being m'ade with internallyprojecting water-courses or chambers that meet, but are preferably disunited, and the upper and lower outside surfaces of which form the crown to the fire-box or chamber and lower face of the return liuc. Said invention also consists in a novel attachment or connection of the Water-bridge at 'the back of the fire-chamber to one side only of the body or case, by means of upper and lower branches, establishing a circulation within said bridge; and furthermore, my invention consists in an arrangement of water pipes or tubes within the returnilue, crosswise of the same, and connected only at their one end with thebody or case, with which, at said end, they are in open communication.

By this, my improvement, there is not only economy and convenience of handling in the construction of the boiler, but its durability is enhanced by the protection given to the joints and freedom for expansion or contraction of its parts without straining the structure, also every facility afforded for cleaningcr repair, and other advantages attained.

Referring tothe accompanying drawing, A represents the fire-box or chamber of the boiler. B its grate, beneath which is arranged the ash-pit. C the water-bridge at back of the fire-chamber. D the smoke pipe or flue, which, commencing at a suitable distance in rear of the bridge C, and dipping slightly below the top edge thereof, afterwards forms an ascent and return passage to or towards the front of the boiler, where it joins a flue or chimney, E. This fire-chamber A and returnilue D are made up of one and the same casting or castings, which constitute the body or case of the boiler, and is formed of two similar or hollow-like castings, F F', constituting water-sides, back and top, to the apparatus,iand by means ot' internally-projecting water-chambers G G', composing the crown to the dre-chamber and inner and lower surfaces to the return-Hue. These chambers G G are branches, the one from the one'shell or casting F, and the other from the other shell or casting F', meeting, or nearly so, at their inner edges, but preferably not joined, so as to relieve the structure of strain and objectionable joint. The two shells F F may be secured to each other by bolts passing through flanges a a along the-vertical division of the body, as formed by the shells F F, and arranged to project within the `water-space of said body, so as to be protected from the action of the fire. The front plate or face H to the boiler may or may not be separately secured to the body. The formation of the fire-chamber and return-flue by one and the same casting or castings affords great facility in the construction, handling, or transportation and erection of the apparatus. I is the flow pipe for the water, and J the return pipe therefor in establishing the necessary circulation for suoli water-heating purpose as it may be proposed to apply the boiler. The water,- bridge C, though extending across or nearly across the back of the tire-chamber, is only connected with one side, shell, or division of the body, to prevent strain on the structure by expansion; and such connection is furthermore established by upper and lower branches c c', that induce circulation of the water in the bridge to the better preservation of the same and uniformity of temperature throughout or' with the contiguous or remaining body of water. Branching also from the one division or shell of the body, withwhieh they are made to communicate, being closed at their opposite ends, are wat-er tubes K, arranged in one or more rows to project across the return-flue D, so as to be acted upon by the escaping smoke and heated gases. Being com nected to only one division or lmlf of the body, and loose from tlie other half thereof, seid tubes exercise, in, expanding, no straining effect upon the structure. 4

A watenheating apparatus constructed :is described will not only be economical to build, but eifective and durable, free from choking or lodginent of soot and dirt, and oll'ering every facility for repair, should suoli be necessary. A

What I claim as my invention, and desire to secure by Letters Patent, is-

l. The fire-chamber A und return-flue D of the boiler, constructed of two hollow sliclls or divisions F F', united by :L vertical joint, as described, and having projecting chambers G G, arranged to form the crown to the fire-box and lower surface to the 1eturnlue, substantially specilied.

2. The eter-bridge C, connected and communicating, by upper and lower bronches, n'tb the one side or half of the body of the boiler, but loose or detached from the other half o1 division thereof, essentially as described.

3. The Water tubes K, arranged to cross the returnflue, and connected and communica-ting with but the one-half or division of the water body or cose of the boiler, as herein set forth.

CEAS. F. HI CHNGS.

Witnesses:

J. W. Comms, G. W. REED. 

